六十三、Docker Swarm-stack部署多service
2022-01-10 本文已影响0人
InsaneLoafer
docker-compose只能在单机上使用，而stack则是swarm版本的docker-compose，二者均能使用docker-compose.yaml文件部署应用。
dockerstack常用命令
[vagrant@swarm-manager flask-redis]$ docker stack
Usage: docker stack [OPTIONS] COMMAND
Manage Docker stacks
Options:
--orchestrator string Orchestrator to use (swarm|kubernetes|all)
Commands:
deploy Deploy a new stack or update an existing stack
ls List stacks
ps List the tasks in the stack
rm Remove one or more stacks
services List the services in the stack
Run 'docker stack COMMAND --help' for more information on a command.
swarm stack 部署多 service 应用
先在swarm manager节点上安装一下 docker-compose
vagrant@swarm-manager:~$ sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
vagrant@swarm-manager:~$ sudo chmod +x /usr/local/bin/docker-compose
国内源地址：
$ sudo curl -L https://get.daocloud.io/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
clone我们的代码仓库
vagrant@swarm-manager:~$ git clone https://github.com/insaneloafer/flask-redis
Cloning into 'flask-redis'...
remote: Enumerating objects: 22, done.
remote: Counting objects: 100% (22/22), done.
remote: Compressing objects: 100% (19/19), done.
remote: Total 22 (delta 9), reused 7 (delta 2), pack-reused 0
Unpacking objects: 100% (22/22), 8.60 KiB | 1.07 MiB/s, done.
vagrant@swarm-manager:~$ cd flask-redis
vagrant@swarm-manager:~/flask-redis$ ls
Dockerfile LICENSE README.md app.py docker-compose.yml
vagrant@swarm-manager:~/flask-redis$
环境清理
vagrant@swarm-manager:~/flask-redis$ docker system prune -a -f
镜像构建和提交， 如果你想做这一步，可以把docker-compose.yml里的 xiaopeng163/flask-redis 改成你的dockerhub id
vagrant@swarm-manager:~/flask-redis$ docker-compose build
vagrant@swarm-manager:~/flask-redis$ docker image ls
REPOSITORY TAG IMAGE ID CREATED SIZE
insaneloafer/flask-redis latest 5efb4fcbcfc3 6 seconds ago 126MB
python 3.9.5-slim c71955050276 3 weeks ago 115MB
提交镜像到dockerhub
vagrant@swarm-manager:~/flask-redis$ docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: insaneloafer
Password:
WARNING! Your password will be stored unencrypted in /home/vagrant/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
vagrant@swarm-manager:~/flask-redis$ docker-compose push
WARNING: The REDIS_PASSWORD variable is not set. Defaulting to a blank string.
Pushing flask (insaneloafer/flask-redis:latest)...
The push refers to repository [docker.io/insaneloafer/flask-redis]
f447d33c161b: Pushed
f7395da2fd9c: Pushed
5b156295b5a3: Layer already exists
115e0863702d: Layer already exists
e10857b94a57: Layer already exists
8d418cbfaf25: Layer already exists
764055ebc9a7: Layer already exists
latest: digest: sha256:c909100fda2f4160b593b4e0fb692b89046cebb909ae90546627deca9827b676 size: 1788
vagrant@swarm-manager:~/flask-redis$
通过stack启动服务
vagrant@swarm-manager:~/flask-redis$ env REDIS_PASSWORD=ABC123 docker stack deploy --compose-file docker-compose.yml flask-demo
Ignoring unsupported options: build
Creating network flask-demo_default
Creating service flask-demo_flask
Creating service flask-demo_redis-server
vagrant@swarm-manager:~/flask-redis$
vagrant@swarm-manager:~/flask-redis$ docker stack ls
NAME SERVICES ORCHESTRATOR
flask-demo 2 Swarm
vagrant@swarm-manager:~/flask-redis$ docker stack ps flask-demo
ID NAME IMAGE NODE DESIRED STATE CURRENT STATE
ERROR PORTS
lzm6i9inoa8e flask-demo_flask.1 insaneloafer/flask-redis:latest swarm-manager Running Running 23 seconds ago
ejojb0o5lbu0 flask-demo_redis-server.1 redis:latest swarm-worker2 Running Running 21 seconds ago
vagrant@swarm-manager:~/flask-redis$ docker stack services flask-demo
ID NAME MODE REPLICAS IMAGE PORTS
mpx75z1rrlwn flask-demo_flask replicated 1/1 insaneloafer/flask-redis:latest *:8080->5000/tcp
z85n16zsldr1 flask-demo_redis-server replicated 1/1 redis:latest
vagrant@swarm-manager:~/flask-redis$ docker service ls
ID NAME MODE REPLICAS IMAGE PORTS
mpx75z1rrlwn flask-demo_flask replicated 1/1 insaneloafer/flask-redis:latest *:8080->5000/tcp
z85n16zsldr1 flask-demo_redis-server replicated 1/1 redis:latest
vagrant@swarm-manager:~/flask-redis$ curl 127.0.0.1:8080
Hello Container World! I have been seen 1 times and my hostname is 21d63a8bfb57.
vagrant@swarm-manager:~/flask-redis$ curl 127.0.0.1:8080
Hello Container World! I have been seen 2 times and my hostname is 21d63a8bfb57.
vagrant@swarm-manager:~/flask-redis$ curl 127.0.0.1:8080
Hello Container World! I have been seen 3 times and my hostname is 21d63a8bfb57.
vagrant@swarm-manager:~/flask-redis$
创建的网络
- docker stack使用docker-compose.yaml文件创建的是overlay网络
- docker compose使用docker-compose.yaml文件创建的是bridge网络
[vagrant@swarm-manager flask-redis]$ docker network ls
NETWORK ID NAME DRIVER SCOPE
c2531fc17c98 bridge bridge local
6934619098b3 docker_gwbridge bridge local
4cddaxhz871q flask-demo_default overlay swarm
cfbe4b854234 host host local
dj39uni7uy49 ingress overlay swarm
0ca57d809728 none null local
如果docker-compose.yaml指定了bridge网络，此时此文件只能适用于开发环境的单机模式。所以最好是区分开发环境和生产环境，分别使用两个compose文件
